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我试图将 pandas-datareader 包安装到 Anaconda 中,但它不起作用。

在 Win 7 Powershell 中,输出为:

Fetching package metadata ...
CondaHTTPError: HTTP None None for url <https://conda.anaconda.org/anaconda/win-64/repodata.json>
Elapsed: None

An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.

我该如何解决这个问题并安装 pandas-datareader 包?

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